package make

import (
	"embed"
	"fmt"

	"github.com/spf13/cobra"

	"github.com/runningwater/gohub/pkg/console"
	"github.com/runningwater/gohub/pkg/file"
	"github.com/runningwater/gohub/pkg/str"
)

// Model 参数解释
// 单个词，用户命令传参，以 User 模型为例：
//   - user
//   - User
//   - users
//   - Users
//
// 整理好的数据：
//
//	{
//	    "TableName": "users",
//	    "StructName": "User",
//	    "StructNamePlural": "Users"
//	    "VariableName": "user",
//	    "VariableNamePlural": "users",
//	    "PackageName": "user"
//	}
//
// -
// 两个词或者以上，用户命令传参，以 TopicComment 模型为例：
//   - topic_comment
//   - topic_comments
//   - TopicComment
//   - TopicComments
//
// 整理好的数据：
//
//	{
//	    "TableName": "topic_comments",
//	    "StructName": "TopicComment",
//	    "StructNamePlural": "TopicComments"
//	    "VariableName": "topicComment",
//	    "VariableNamePlural": "topicComments",
//	    "PackageName": "topic_comment"
//	}
type Model struct {
	TableName          string
	StructName         string
	StructNamePlural   string
	VariableName       string
	VariableNamePlural string
	PackageName        string
}

// tplsFS 方便我们后面打包的 .tpl 为后缀的文件
//
//go:embed tpls
var tplsFS embed.FS

var CmdMake = &cobra.Command{
	Use:   "make",
	Short: "Generate code and file",
}

func init() {
	// 注册 make 子命令
	CmdMake.AddCommand(
		CmdMakeCMD,
		CmdMakeModel,
		CmdMakeAPIController,
		CmdMakeRequest,
		CmdMakeMigration,
		CmdMakeFactory,
		CmdMakeSeeder,
		CmdMakePolicy,
	)
}

// makeModelFromString 通过用户传入的字符串，生成模型数据
func makeModelFromString(name string) Model {
	model := Model{}
	model.StructName = str.Singular(str.Camel(name))
	model.StructNamePlural = str.Plural(model.StructName)
	model.TableName = str.Snake(model.StructNamePlural)
	model.VariableName = str.LowerCamel(model.StructName)
	model.PackageName = str.Snake(model.StructName)
	model.VariableNamePlural = str.LowerCamel(model.StructNamePlural)

	return model

}

// createFileFromTpl 读取 tpl 文件并进行变量替换
// 最后个选项可选参数，允许用户传递变量替换
func createFileFromTpl(filePath, tplName string, model Model, vars ...map[string]string) {

	replaces := make(map[string]string)
	if len(vars) > 0 {
		for _, _var := range vars {
			for k, v := range _var {
				replaces[k] = v
			}
		}
	}

	// 文件已经存在
	if file.Exists(filePath) {
		console.Exit(filePath + " already exists")
	}

	// 读取 stub 文件内容
	stub, err := tplsFS.ReadFile("tpls/" + tplName + ".tpl")
	if err != nil {
		console.Exit(err.Error())
	}
	modelStub := string(stub)

	// 替换变量,默认的变量
	replaces["{{TableName}}"] = model.TableName
	replaces["{{StructName}}"] = model.StructName
	replaces["{{StructNamePlural}}"] = model.StructNamePlural
	replaces["{{VariableName}}"] = model.VariableName
	replaces["{{VariableNamePlural}}"] = model.VariableNamePlural
	replaces["{{PackageName}}"] = model.PackageName
	// 替换变量
	for search, replace := range replaces {
		modelStub = str.ReplaceAll(modelStub, search, replace)
	}

	// 存储到目标文件中
	err = file.Put([]byte(modelStub), filePath)
	if err != nil {
		console.Exit(err.Error())
	}

	console.Success(fmt.Sprintf("[%s] created.", filePath))
}